Well, remember on an air-cooled car you're turning the fan along with the generator/alternator, so that's where your drag is coming from in that case. Years ago the Vee drivers ran their fan belts loose to get that extra bit of HP. Eventually they let us scrap the fan altogether and run with forward-facing air scoops.
Another thought-how about a larger alternator pulley so it spins slower and takes less effort from the engine?

If I remember correctly I was told that on the air-cool , the Gen. use up about 3-5 HP at speed. Thats a load on a 50-60 HP engine. I believe the gen. turns 1 1/2 times more RPM's than the crankshaft.  Remember the small dia. "power pulley" you could buy for the crankshaft. They worked except I was concerned about over-heating at freeway speeds in hot weather . A oven therm. proved that fact to me. I think all this "messing around"destroying" a nice  car is a waste of time for what you can gain in MPG unless you are just bored to death and needed something to do.  "Pop" Coker, Corkey's grandpa told me a long time ago that his 40hp A model Fords only got about 15 MPG. Now we have 300-400 HP rolling stock getting high 20's to low 30's MPG.

Check it out ,  Volvo spoiler.   Come hither Mpg's

It's probably folded into a taco by now.

Maybe you've gone too far. Your wing was obviously too aerodynamic for it to fly away!

Please tell me you made that out of paper, NOT aluminum.
Otherwise the guy behind you may be paying you a little visit.
-Busted windshield...
If your gonna play, play safe.
KC

Do you still own Stupie?
Is he jellous?
KC

I scored these rims  and low porfile tires at the triangle junk yard.  30 bucks for rim and tire.  I hope the fit.

Your dirt driveway looks nice. How do you keep it from looking dirty?